A heatwave in the Canadian Arctic, for example, led to increased cod reproduction in 2009. Some heatwaves also have positive effects. Marine heat waves have also led to bleaching and mass mortality of corals in Australia’s Great Barrier Reef and other coral reefs in Southeast Asia. As a result, commercial cod fishing, valued at over $100 million per year, was closed in 2020.Īnother heatwave in the south-eastern Pacific Ocean led to mass mortality of farmed salmon in southern Chile due to harmful algae blooms. Loss of ecosystem services can in turn hit the bottom line for marine industries such as aquaculture, fisheries and tourism.Ī recent heatwave mentioned in the study occurred in the Gulf of Alaska and caused a decline in the Pacific cod stock. This may be due to the fact that populations move or that many individuals die when the sea suddenly becomes too hot for them. Researchers point out that marine heatwaves affect the ability of ecosystems to provide these services. The ecosystems in the sea provide a number of services that humans enjoy - for example in the form of food, jobs, nature experiences and cultural values, IMR explained in an article on its website. In short, marine heatwaves have occurred everywhere, with significant disruption of human-ocean interactions.” “In total, we documented more than 150 individual impacts that span all large sea areas. “We found that each of these marine heatwaves could be linked to several socioeconomic effects,” said one of the authors, Thomas Wernberg, a researcher at Norway’s Institute of Marine Research (IMR) and a professor at the University of Western Australia. Thomas Wernberg: Each of 34 marine heatwaves could be linked to several socioeconomic effects.
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